Pump-piston.



No. 774,161. PATENTED NOV. 8, 1904. G. M. COTE & R. E. MGGLURE.

- PUMP PISTON.

APPLICATION FILED SEPT. 19, 1903.

N0 MODEL.

UNITED STATES Patented November 8, 190 4.

PATENT OFFICE.

GEORGE M. OGTF, OF PITTSBURG, ANT) RICHARD E.,M 0CLURE, OF BELLE- VUE, PENNSYLVANIA; SAID COTE ASSIGNOR TO SAID MoCLURE.

PUMP-PISTON.

SPECIFICATION formingpart of Letters Patent No. 774,161,11ated November 8, 1904.

Application filed September 19, 1903. Serial No. 17 3,815. (No model.)

To aZZ whom it may concern.-

Be it known that we, GEORGE M. com, a resident of Pittsburg, and RICHARD E. MoCLURE, a resident of Bellevue, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Pump-Pistons; and we do hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to pump-pistons, and has special reference to such pistons as are used in the pumping of oil and other like Artesian wells.

The object of our invention is to provide a simple, cheap, and effective pump piston which will automatically pack itself within the working barrel at all times, as well as one which will be strong and durable and will not be cut or worn out by the salt water, sand, or other gritty substances coming in contact therewith.

Our invention consists, generally stated, in the novel arrangement, construction, and combination of parts, as hereinafter more specifically set forth and described, and particularly pointed out in the claims.

To enable others skilled in the art to which our invention appertains to construct and use the pump-pistons, We will describe the same more fully, referring to the accompanying drawings, in which Figure 1 is a sectional view of a working barrel, showing a side view of the pump-piston therein, with a portion of one of the cups in section. Fig. 2 is a cross-section on the line 2 2, Fig. 1. Fig. 3 is a vertical sectional view of the upper cup and its engaging rings. Fig. 4: is a face View of one of the middle rings for supporting said cups, and Fig. 5 is a like view of one of the end cups, showing the annular seat.

Like symbols of reference herein indicate like parts in each of the figures of the drawings.

As illustrated in the drawings, 1 represents the working barrel of an oil-well, and Within.

this barrel is the pump-piston 2, which is formed of the tubing 3, having the followernut 1, detachably secured at the bottom thereof and fitting against the jam-nut 4' around said tubing 3. Above the follower-nut 4 and fitting around the tubing 3 is the lower ring 5, which is provided with the annular seat 6 in the up per face 6 thereof, while an upper or scraper ring 7 engages the barrel 1 and fits against the collar 7 around the upper end of the tubing 3, and is provided with the annular seat 8 on the lower face 8 thereof. Cups 9 for engaging the barrel 1' are confined between the end rings 5 and 7 and are preferably three in number, being separated by the middle rings 10, which are provided with annular seats 11 on their upper and lower faces 11 and 11", respectively, and these cups 9 are formed in two sections 9 by being severed or cut on each side on a diagonal line, as at 12, while annular recesses 13 are formed in the peripheries 13 of each of the said cups. These cups 9 are also provided with annular flanges 14, extending around the upper and lower faces 14 and 1A, respectively, and such flanges 14 are adapted to fit within the seats 6, 8, and 11,

formed in the rings 5, 7, and 10, respectively, for holding the said cups in position and prevent their dropping out in handling. The rings 5 and 10 have lugs 15, extending up within the seats 11 therein, and these lugs are adapted to fit within seats or recesses 16, formed in the flanges 14 of the cups 9 for holding said cups in place in alinement, so as to stagger the diagonal cuts 12 therein, while leafsprings 17 are adapted to fit between the tubing 3 and the cups 9 for engaging said cups to hold the latter against the barrel 1.

Above the collar 7 on the tubing 3 is the usual valve-cage 18, which is detachably connected to the top of the said tubing by its base 19 in the ordinary manner, and within this cage 18 is the ordinary ball-valve 20 for engaging with the upper or open end of the tubing 3 in the base 19. a.

The use -and operation of our improved pump-piston is as follows: Arranged and supported within the working barrel 1 below the pump-piston 2 is the well-known stand-valve, and in the ordinary and well-known operation of the device said piston 2 is raised by the ordinary sucker-rod within the barrel 1 and connected to the threaded end 18 on the cage 18, which causes the oil to pass up through the stand-valve and raise the valve therein to allow the oil to enter the space between said stand-valve and the pump-piston 2. When the piston 2 is lowered by the sucker-rod, the valve in the stand-valve is dropped to its seat in its cage to close off further entrance of the oil through the stand-valve, and the oil within the space between said stand-valve and the piston 2 is forced up through the tubing 3 of the piston 2 and acts to raise the ball-valve 20 in the cage 18, so that said oil can pass out through the cage 18 into barrel 1 above the piston 2, and thence up through said barrel to the top of the well and into the pipe-line leading to the storage-tank. As these operations are thus continued the cups 9 are pressed tightly against the barrel 1 by the springs 17 and are packed by the entrance of oil, paraffin, 620., into the recesses 13 in the peripheries 13' of said cups, as well as into the diagonal cuts 12 of said cups, forming the sections 9', while the scraper-ring 7 will act to scrape any parafiin or other substance from the interior of the barrel 1 during the movement of the piston 2. The lugs 15 on the cups 5 and 10, fitting within the seats 11 therein, as shown in Fig. 1, are so arranged as to permit the cups 9 to bear against the barrel 1 on all sides and at the same time prevent said cups from turning out of vertical alinement with each other, while such arrangement will enable all the cups and rings to be revolved together when desired for any purpose.

It will be evident that as the cups 9 become worn the springs 17 will always cause them to expand and keep them in contact with and packed against the interior of the barrel 1, and such cups will always be kept thoroughly packed in the recesses 13 and cuts 12 by the oil, paraifin, &c., entering therein during the contin ued and constant movement of the piston 2 in its operation. The diagonal cuts 12 in the cups 9 are preferably staggered on the piston 2, so as to overcome all liability of the oil passing around the piston, and such cups being held by the nuts 4 4: around the tubing 3 it will be obvious that with the assistance of the lugs 15 they can all be revolved together or in unison with the rings 5, 7, and 10, if desired for any purpose, as hereinbet'ore stated.

It will be seen that our improved pump-piston can be adopted for other uses than that of pumping oilwells, and various modifications and changes in the construction and design may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

Practical experience in the use of our improved pump-piston has proven that it will not be readily cut out by sand, salt water, &c. as is the case of the ordinary piston, and being an automatic and self-packer it will overcome all liability of the oil passing around the same, as in the usual cases, while at the same time the cups will bear on all sides against the interior of the working barrel when in use.

What we claim as our invention, and desire to secure by Letters Patent, is

1. A pump-piston, comprising a tube, aseries of eXpansible sectional cups around said tube for engaging with the working barrel, and means fitting within and engaging with said cups for holding and supporting them in position.

2. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, and rings on said tube and fitting within said cups for holding and supporting them in position.

3. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, rings on said tube having seats therein, and flanges on said cups for fitting within said seats to hold and support said cups in position.

4:. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, said cups having recesses around their periphcries for the entrance of oil, &c., therein to form a packing for said cups, and means fitting within and engaging with said cups for holding and supporting them in position.

5. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, said cups having recesses around their peripheries for the entrance of oil, 860., therein to form a packing for said cups, and rings on said tube and fitting within said cups for holding and supporting them in position.

6. A pump-piston, comprisinga tube, a series of sectional cups around said tube, springs around said tube and engaging with said cups for holding the same in contact with the working barrel, said cups having recesses around the peripheries for the entrance of the oil, 860. therein to form a packing for said cups, a series of rings on said tube having seats therein, and flanges on said cups adapted to enter said seats for supporting said cups.

7. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, and means engaging with said cups for holding the same in vertical alineinent to stagger the cuts or openings between said cup-sections.

8. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, rings on said tube, and means on said rings engaging with said cups for holding said cups in vertical alinement to stagger the cuts or openings between said cup-sections.

9. A pump-piston, comprising a tube, a series of expansible sectional cups around said tube for engaging with the working barrel, flanges on said cups having seats therein, rings on said tube and provided with seats therein, and lugs on said ring-seats and adapted to enter the seats in said flanges for holding said cups in vertical alinement to stagger the cuts or openings between said cup-sections.

10. Apurnp-piston, comprisinga tube, a series of sectional cups around said tube, springs around said tube and engaging with said cups for holding the same in contact with the Working barrel, said cups having recesses for the entrance of oil, &c., therein to form a packing for said cups, a series of rings on said tube having seats therein, flanges on said cups having seats therein, said flanges being adapted to enter the seats in said rings for supporting said cups, and lugs on said seats adapted to enter the seats in the cup-flanges for holding said cups in position.

In testimony whereof we, the said GEORGE M. COTE and RICHARD E. MOCLURE, have hereunto set our hands.

GEORGE M. ooTE. RICHARD E. MOCLURE.

Witnesses:

J. N. (1001112, H. B. HATTON. 

